21281140

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{56003}}^1$

素因数の和:56031

約数の個数: 24

約数和(自身を含む): 47043360

約数和(自身を除く): 25762220

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 56003, 112006, 224012, 280015, 560030, 1064057, 1120060, 2128114, 4256228, 5320285, 10640570, 21281140]

約数ペア:

[(1, 21281140), (2, 10640570), (4, 5320285), (5, 4256228), (10, 2128114), (19, 1120060), (20, 1064057), (38, 560030), (76, 280015), (95, 224012), (190, 112006), (380, 56003)]